One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,14)(12,16)(13,15)(17,18,22,24)(19,29,31,25)(20,26,30,32)(21,27,23,28)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(18,24)(19,30)(20,31)(21,23)(25,32)(26,29)(10,15)(14,16)(17,19,22,31)(18,25,24,29)(20,21,30,23)(26,28,32,27)(9,12,13,11)(10,16,15,14)(17,20)(18,26)(19,21)(22,30)(23,31)(24,32)(25,28)(27,29)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,27,24,28)(19,30,31,20)(25,26,29,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.